<template>
	<view class="nav">
		<view :style="'height:'+navStatus+'rpx;'+containerStyle"></view>
		<view class="headNav" v-if="isHome" :style="'height:'+navHeight+'rpx;line-height:'+navHeight+'rpx;padding-left:20rpx'">
			<text class="city">中部地区</text>
			<view style="flex:1">
				<navigator url="../../pages/search/index"
				:style="'height:'+menu.height*2+'rpx;line-height:'+menu.height*2+
				'rpx;margin-top:'+(menu.top*2-navStatus)+
				'rpx;margin-left:32rpx;margin-right:'+(menu.width*2+24)+
				'rpx;background:#f4f4f4;border-radius:200rpx;text-align:center'">
					<text class="search-text">找医院</text>
				</navigator>
			</view>
		</view>
		<view v-else class="navbar" :style="'height:'+navHeight+'rpx;'+ containerStyle">
			<view class="back-icon" @click="backHome">
				<!-- 判断返回首页还是返回上一页  获取当前页面栈实例-->
				<image v-if="pages>1" src="../../static/resource/navbar/ic_back.png"></image>
				<image v-else src="../../static/resource/navbar/ic_home.png"></image>
			</view>
			<view class="nav-title" v-if="titleText">
				<view :style="'height:'+navHeight+'rpx;line-height:'+navHeight+'rpx;'+textStyle">{{titleText}}</view>

			</view>
		</view>
	</view>
</template>

<script setup>
	import {
		ref,
		onBeforeMount,
		defineProps,
		reactive
	} from 'vue'
	const props = defineProps({
		background: {
			type: String,
			default: "rgba(255,255,255,1)"
		},
		color: {
			type: String,
			default: "rgba(0,0,0,1)"
		},
		fontSize: {
			type: String,
			default: "32"
		},
		iconWidth: {
			type: String,
			default: "116"
		},
		iconHeight: {
			type: String,
			default: "38"
		},
		titleText: {
			type: String,
			default: ""
		},
		isHome: {
			type: String,
			default: false
		}
	})
	// 状态栏高度
	const navStatus = ref(0)
	// 内容高度
	const navHeight = ref(0)
	// 背景颜色
	const containerStyle = ref("")
	// 字体样式
	const textStyle = ref("")
	// 图标样式
	const iconStyle = ref("")
	// 页面栈数量
	const pages = ref(getCurrentPages().length)
	// 获取胶囊的位置
	const menu=reactive(uni.getMenuButtonBoundingClientRect())
	// 计算状态栏高度
	const setNavSize = () => {
		const res = uni.getSystemInfoSync()
		const {
			system,
			statusBarHeight
		} = res
		// 一般情况下UI给的图都是375px，但是rpx单位一般是750px为基准
		// 调用API获取的值为px。该项目使用单位为rpx,所以需要乘以2
		navStatus.value = statusBarHeight * 2
		const isiOS = system.indexOf('iOS') > -1
		if (!isiOS) {
			navHeight.value = 96
		} else {
			navHeight.value = 88
		}
	}
	onBeforeMount(() => {
		setNavSize()
		setStyle()
	})
	// 样式设置
	const setStyle = () => {
		containerStyle.value = ['background' + props.background].join(';')
		textStyle.value = ['color' + props.color, 'fontSize' + props.fontSize + 'rpx'].join(';')
		iconStyle.value = ['width' + props.iconWidth + 'rpx', 'height' + props.iconHeight + 'rpx'].join(';')
	}
	// 页面跳转
	// 跳转tabbar页面需要用switchTab API
	const backHome = () => {
		if (pages.value > 1) {
			uni.navigateBack()
		} else {
			uni.switchTab({
				url: '/pages/index/index'
			})
		}
	}
</script>

<style>
	.nav {
		position: fixed;
		width: 100%;
		top: 0;
		left: 0;
		z-index: 2
	}

	.back-icon {
		display: flex;
		align-items: center;
		width: 64rpx;
		height: 100%;
		margin-left: 20rpx;
	}

	.back-icon image {
		width: 64rpx;
		height: 64rpx;
	}

	.navbar {
		position: relative;
	}

	.nav-title {
		position: absolute;
		top: 0;
		left: 50%;
		transform: translate(-50%);
	}
	.headNav{
		display: flex;
		
	}
	.city {
	    display: inline-block;
	    position: relative;
	    font-size: 30rpx;
	    font-weight: bold;
	    padding-left: 55rpx;
	    background: url()
	        no-repeat left center;
	    background-size: 40rpx;
	}
	
	.city:after {
	    content: ' ';
	    display: inline-block;
	    height: 6px;
	    width: 6px;
	    border-width: 1px 1px 0 0;
	    border-color: #353535;
	    border-style: solid;
	    -webkit-transform: matrix(0.71, 0.71, -0.71, 0.71, 0, 0);
	    transform: matrix(0.71, 0.71, -0.71, 0.71, 0, 0);
	    position: relative;
	    top: -2px;
	    position: absolute;
	    top: 50%;
	    margin-top: -4px;
	    right: -10px;
	}
	.search-text {
	    display: inline-block;
	    padding-left: 30rpx;
	    color: #bbbbbb;
	    font-size: 26rpx;
	    background: url()
	        no-repeat left center;
	    background-size: 23rpx;
	}
</style>